Zenitsu from Demon Slayer gets cold-feet every time he is faced with danger
Handa Seishuu from Barakamon is known for being an overthinker, often getting caught up in his own thoughts & anxieties
Komi-san from Komi Can't Communicate suffers from extreme social anxiety
Hachiman Hikigaya from My Teen Romantic Comedy and his habit to overanalyse every decision he makes
To Aoshi Tokimitsu from Blue Lock just the thought of Failure scares him to hell
Karen Tendo from Gamers! ends up overthinking to find the best possible way to Reject a boy's confession